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## Toolbox for Modeling and Analysis of Power Networks in the DQ0 Reference Frame

version 2.05 (553 KB) by

Analyzes the dynamics of symmetric power networks, generators, and loads in the DQ0 reference frame

Updated

http://a-lab.ee/projects/dq0-dynamics
-- What this tool does
This is a free software tool for analyzing the dynamics of power systems based on dq0 signals. It is designed to simulate and analyze power systems that include several generators and loads, and possibly a large transmission network. The software provide tools for constructing dynamic models of the system components, and enables analysis in the frequency domain or the time domain. The manual and software provide simple explanations and examples that can help one get started.
-- When to use this software
Several approaches exist for modeling the dynamic behavior of three-phase power systems. Transient simulations that use the abc frame of reference describe the system by means of physical quantities, and thus offer high accuracy and flexibility. This approach is often the most general, since it applies to nonsymmetric systems, and is valid over a wide range of frequencies. Another popular approach is to model the power system using time-varying phasors, often by using the network power flow equations. This approach has many benefits, one of them is that the transmission network is described by means of purely algebraic equations. However, time-varying phasors are only applicable at low frequencies, under the assumption that the system is quasi-static.
A solution that complements these two well-known approaches is to model large power systems on the basis of dq0 quantities. This approach is not as general as abc-based models, and is advantageous mainly when the network and units are symmetrically configured. However, dq0 models combine two properties of interest: similar to transient models, dq0-based models are derived from physical models, and are therefore accurate at high frequencies, so the assumption of a quasi-static network is not required. In addition, similarly to time-varying phasors, dq0 models are time-invariant. This property allows to define an operating point, and enables small-signal analysis, and stability analysis.
-- How this software operates
(More details available at the software manual - see above).
The software describes power systems by means of signal-flow diagrams, in which each component is modeled by dq0 quantities. Transmission networks are represented by linear state-space models with voltage inputs and current outputs. The software automatically constructs the model matrices based on the network data. This can be done using the graphical user interface, or directly from the Matlab command line. The resulting state-space models are of minimal order, and use sparse system matrices, and are therefore suitable for large power systems. The network and its components are modeled using a dq0 transformation that is based on a unified reference frame.
** Installation
** Tutorial
** How to cite this work
are available in the software manual (see link above)
-- Contact
http://yoash-levron.eew.technion.ac.il/contactus/contact-2/

wei chaofeng

raman hamdan

thank you

PaulPogba

Sven Koerner

### Sven Koerner (view profile)

##### MATLAB Release
MATLAB 8.4 (R2014b)